GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER

5.7 vortec how to carb

Discussion in 'GM Powertrain' started by dutch4x4gmc, Jan 22, 2010.

  1. dutch4x4gmc

    dutch4x4gmc New Member

    Joined:
    Jan 22, 2010
    Messages:
    1
    Likes Received:
    0
    new to site but got acces to a free 5.7 vortec that runs good and need to know how hard itwould be to carb. and regular dist. this motor and install in 85 gmc
    #1
  2. silveradotrailblazer

    silveradotrailblazer New Member

    Joined:
    Dec 23, 2008
    Messages:
    7,291
    Likes Received:
    20
    Edelbrock makes a intake carb manifold for that conversion. The vortec heads half a differant angle where the manifold mounts to the heads. I've seen MSD distributors installed on them but dont know what is involve. I'm sure MSDs tech line can help you.
    #2
  3. cwbontheyfz

    cwbontheyfz New Member

    Joined:
    Dec 5, 2009
    Messages:
    53
    Likes Received:
    1
    gaskets

    there is a edelbrock manifold for that engine just make sure you order the edelbrock manifold gaskets that match or you will have all kinds of problems they are not cheap but a must i have been through it already. and make sure you get the right crab that's another problem with that combo but one great running engine when finished
    #3
  4. project86

    project86 New Member

    Joined:
    Nov 28, 2008
    Messages:
    31
    Likes Received:
    0
    Hey I did this swap into an 86 c20 about a year and a half a go. I've got a little write up about it in the classic c/k forum if you need it, or any questions let me know. These guys are right though the angle on the heads are different so you do need a vortec intake manifold. I ordered one through summit racing, as for the distributor I used a new stock HEI distributor that was for the 86 model engine it was replacing. I have an edelbrock 1406 carb sitting on top of it all with an electronic fuel pump. The motor performs awesome in the ol truck. Before i swapped it over to 4wd i had 29" tires, 700r4 transmission, and 3.73 gears. on the hwy i got a consistent 20 mpg and even pulling my 19 ft bowrider boat i got 17 mpg back and forth from the lake. like i said any questions let me know, good kuck.
    #4

Share This Page